The International CBX Owners Association

I am starting to build up an engine I've have for a while that was stripped before I got it, there are some valve buckets missing and I can't find any over here (UK) so a bit of lateral thinking and I got a set from a CB750f (twin cam).
These appear exactly the same as the CBX buckets but do not have any 'A or B' markings that I can see.
Any thoughts on using them?

I have a bunch of them from a Cbx but am in USA. I personally wouldn’t chance a disaster over this issue. Piece of mind. I will ship anywhere.

DOHC 4 buckets are within the specs for the CBX if you can't locate the A or B buckets you need.

Just check each one for free movement in its respective bore to be certain.

CBX-tras wrote: ↑

Mon Mar 20, 2023 8:30 am

DOHC 4 buckets are within the specs for the CBX if you can't locate the A or B buckets you need.

Just check each one for free movement in its respective bore to be certain.

Does dohc buckets have a and b?

I will have some CBX valve buckets - send me a message if you still need some. (I am in UK)

tevan wrote: ↑

Mon Mar 20, 2023 11:26 am

CBX-tras wrote: ↑

Mon Mar 20, 2023 8:30 am

DOHC 4 buckets are within the specs for the CBX if you can't locate the A or B buckets you need.

Just check each one for free movement in its respective bore to be certain.

Does dohc buckets have a and b?

No.
When the CBX (1st, 422) was developed, they wanted to be more precise in the fitting of these components.
With the first DOHC 4, 750 (425) the bucket specs changed to allow for just one part, which can usually work for either A or B, CBX buckets.

However, just like we've seen with valve shims, some can be a slightly different dimension than others. Just check the fit of the actual part to the bore.